(Also see, from 2012) âThe Aspen 50 â Forbes billionaires in Pitkin County.â) Aspenâs wealthiest men and the worldâs sixth richest, brothers Charles and David Koch, for example, are worth $6 billion more than they were a year ago â and a mind-boggling $17 billion more than in 2012.
Tests and diagnosis. A medical doctor specializing in vision and eye disorders (ophthalmologist) should conduct your child's eye exam. The exam will include an assessment of potential nystagmus, strabismus and photophobia.
A photoionization detector or PID is a type of gas detector. Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per billion to 10 000 parts per million (ppm).The photoionization detector is an efficient and inexpensive detector for many gas and vapor analytes.A PID may produce instantaneous readings and operate continuously. These hand-held, battery-operated detectors are widely used in military, industrial, and confined working facilities for safety.he first commercial application of photoionization detection was in 1973 as a hand-held detector for the purpose of detecting leaks of volatile organic compounds (VOC's), specifically vinyl chloride monomer (VCM), at a chemical manufacturing facility.